Not necessarily, to put fluid into the tank the pump has to run AND the inlet valve /injector (to the fuel tank has to be open).dexy350 wrote:hi Jim
only thing that concerns me it must pump all the Eolys fluid into the tank which carnt be good .
so is there any cures out there .apart from pulling the fuse every time it starts running
cheers
dexy
I am not sure if what I am about to say is correct but it is how I suspect that the system works.
The most accurate way of metering precisely what can be relatively small quantities of liquid is to charge the liquid to a defined pressure and then inject it through a fixed metering orfice the amount of fluid being injected being proportional to the time that the orfice is open. So in summary I believe the eolys injection system works not unlike the engine injection system.
If this system is engineered properly it follows from this that the pump will always run to maintain a fixed pressure in the Eolys supply line to the tank injector but why the pump runs when switching of the engine I can't expalin unless that is normal operation. The only time that the pump would need to run is after fuelling the car as detected by the filler cap being opened.
I believe that the logic would go something like this:-
Engine off and filler cap open check fuel quantity, run pump to pressure system, cap shut get new fuel quantity, go calculate fuel added, go calculate injector open time, open injector for required time, run pump to maintain pressure, close injector stop pump.
There is I believe a failure case for when the cap switch is not working, the system will inject an amount of eolys corresponding to a max fuel load during every engine start / run cycle but I don't know if that happens when the engine is started or when it is stopped, if the latter then that maybe is what you are hearing and there is a problem with the cap switch.
Please don't take any of the above as Gospel it is a little bit of knowledge and a lot of conjecture.
cachaciero